Two pipes P and Q, when opened alone can fill the tank in 20 and 30 ho – McqOptions

MCQOPTIONS

1.	Two pipes P and Q, when opened alone can fill the tank in 20 and 30 hours respectively. If both pipes are opened together, then in how many hours will the tank be filled?
A.	12
B.	24
C.	8
D.	15
Answer» B. 24

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